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Analysis of nonequilibrium double tunnel junctions

Journal Article · · J. Low Temp. Phys.; (United States)
DOI:https://doi.org/10.1007/BF00115000· OSTI ID:6513749
The double tunnel junction M/sub 1/--S/sub 2/--M/sub 3/ consists of generator and detector tunnel junctions with a common electrode S/sub 2/. The quantity R/sub 2/(E), the time rate of change of the quasiparticle distribution function (produced by the generator current), is calculated for each branch of the excitation spectrum in S/sub 2/. The rates of change of the quasiparticle number density n/sub 2/, the particle branch imbalance Q/sub 2/, and the distribution function branch imbalance Q*/sub 2/ are also calculated. The detector excess current--voltage characteristic deltaI/sub d/ vs. V/sub d/ is calculated for arbitrary excess distributions deltaf< (E) and deltaf> (E) in S/sub 2/. Computed characteristics are obtained assuming square distributions of appropriate amplitudes for deltaf; these characteristics show a zero-voltage current deltaI/sub d/(0) and asymmetric structure at eV/sub d/= +- (..delta../sub 2/+..delta../sub 3/) and eV/sub d/= +- (eV/sub g/-..delta../sub 1/ +- ..delta../sub 3/). The square distributions are only approximate; the actual distributions would produce additional structure at eV/sub d/= +- (eV/sub g/+..delta../sub 1/ +- ..delta../sub 3/). The results are discussed for M/sub 1/ and M/sub 3/ either normal or superconducting.
Research Organization:
Department of Physics, University of Virginia, Charlottesville, Virginia
OSTI ID:
6513749
Journal Information:
J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 33:3; ISSN JLTPA
Country of Publication:
United States
Language:
English

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Related Subjects

420201* -- Engineering-- Cryogenic Equipment &amp; Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISTRIBUTION FUNCTIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILMS
PHYSICAL PROPERTIES
QUASI PARTICLES
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT